When I use service discovery Java API to register a service instance, the 
service type default is dynamic.  The service instance node is ephemeral in 
ZooKeeper so the node is deleted when the program exits.  However, if I set the 
service type to static or permanent, the node is still deleted when the program 
exits. At ZooKeeper, the node created is not ephemeral though.   I am wondering 
if this is by design.  Is there any way to create static/permanent service with 
Java API? Or they can only be created with RESTFul API though x-discover-server.

Thanks,
Ying-Yi

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